이만 원 이상 납부 시 비례해서 만료일 계산 - #19

GDSC-MYONGJI · Jan 12, 2023 · 3f50087 · 3f50087
1 parent afe5337
commit 3f50087
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diff --git a/김정호/src/test/java/com/hou27/chap03/ExpiryDateCalculator.java b/김정호/src/test/java/com/hou27/chap03/ExpiryDateCalculator.java
@@ -7,6 +7,9 @@ public LocalDate calculateExpiryDate(PayData payData) {
     if(payData.getFirstBillingDate() != null) {
       return payData.getBillingDate().plusMonths(1).withDayOfMonth(payData.getFirstBillingDate().getDayOfMonth());
     }
+    if(payData.getPayAmount() >= 20_000) {
+      return payData.getBillingDate().plusMonths(payData.getPayAmount() / 10_000);
+    }
     return payData.getBillingDate().plusMonths(1);
   }
 

diff --git a/김정호/src/test/java/com/hou27/chap03/ExpiryDateCalculatorTest.java b/김정호/src/test/java/com/hou27/chap03/ExpiryDateCalculatorTest.java
@@ -66,6 +66,25 @@ public class ExpiryDateCalculatorTest {
     assertExpiryDate(payData3, LocalDate.of(2020, 3, 30));
   }
 
+  @Test
+  void 이만_원_이상_납부_시_비례해서_만료일_계산() {
+    assertExpiryDate(PayData.builder()
+            .billingDate(LocalDate.of(2019, 1, 31))
+            .payAmount(20_000)
+            .build(),
+        LocalDate.of(2019, 3, 31));
+    assertExpiryDate(PayData.builder()
+            .billingDate(LocalDate.of(2019, 5, 31))
+            .payAmount(40_000)
+            .build(),
+        LocalDate.of(2019, 9, 30));
+    assertExpiryDate(PayData.builder()
+            .billingDate(LocalDate.of(2020, 1, 31))
+            .payAmount(60_000)
+            .build(),
+        LocalDate.of(2020, 7, 31));
+  }
+
 
   private void assertExpiryDate(PayData payData, LocalDate expiryDate) {
     ExpiryDateCalculator cal = new ExpiryDateCalculator();